Earth and Universe

3. Millions of stars forming part of the galaxy
6. Imaginary line that connects the North and South Pole
8. Sphere in the middle of the Earth
11. The space outside of Earth, has 5 layers
13. Four furthest planets to the sun, made with gas
14. A big star in the center of the solar system
16. Imaginary line that dives Earth into the North and South Hemisphere
17. Represents the Earth in a way that is physically accurate because it is round
18. Earth spins on its axis and takes 24 hours (day and night) to do this

1. Eight planets orbiting around the sun in space
2. Earth orbits around the sun and takes one year to do this
4. All the layers of rock and mineral inside the Earth
5. The planet we live in
7. All the layers of water on Earth, has three different states
8. Earth's outermost layer, made with tectonic plates
9. Four closest planets to the sun, made with rocks and metal
10. Represents Earth on a flat surface
12. The Earth's only natural satellite, rotation and revolution lasts 28 days
15. Middle layer of the Earth, very hot and creates magma